moved MDISubPlot to separate file

mainwin.py

@@ -3,7 +3,8 @@ from PyQt5.QtWidgets import QMainWindow, QSplitter
 
 import assets
 from dictlist import DictList
-from mdi import MDIArea, MDISubPlot
+from mdiarea import MDIArea
+from mdisubplot import MDISubPlot
 from rpcserverthread import RPCServerThread
 from plotdesc import PlotDescription
 from exampledata import exampledata

mdiarea.py

@@ -1,7 +1,5 @@
-from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QMdiArea, QAction
-from PyQt5.QtWidgets import QMdiArea, QMdiSubWindow, QAction
 from PyQt5.QtGui import QPainter
-import pyqtgraph as pg
 
 import assets
 from theme import MDI_BKG
@@ -69,19 +67,3 @@ class MDIArea(QMdiArea):
 
 
 
-class MDISubPlot(QMdiSubWindow):
-
-    def __init__(self, title, desc, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.setWindowTitle(title)
-        self.setWindowIcon(assets.char())
-
-        # without this, the SubWindow is not removed from the subWindowList
-        self.setAttribute(Qt.WA_DeleteOnClose)
-
-        plt = pg.PlotWidget()
-        self.plot = desc.make_plot(plt)
-        self.setWidget(plt)
-
-
-

mdisubplot.py

@@ -0,0 +1,22 @@
+from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QMdiSubWindow
+import pyqtgraph as pg
+import assets
+
+
+class MDISubPlot(QMdiSubWindow):
+
+    def __init__(self, title, desc, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.setWindowTitle(title)
+        self.setWindowIcon(assets.char())
+
+        # without this, the SubWindow is not removed from the subWindowList
+        self.setAttribute(Qt.WA_DeleteOnClose)
+
+        plt = pg.PlotWidget()
+        self.plot = desc.make_plot(plt)
+        self.setWidget(plt)
+
+
+